Bombshelter ventilation means



June 11, 1963 M, M. ROSENFELD 3, 7

BOMBSHELTER VENTILATION MEANS Filed Sept. 19. 1961 INVENTOR.

" MORTON M.ROSENFELD I (I, BY

- M HM ATTORNEY United States Patent 3,093,057 BOMBSHELTER VENTILATION MEANS Morton M. Rosenfeld, 271 Madison Ave., Mount Vernon, NY.

Filed Sept. 19, 1961, Ser. No. 139,192 3 Claims. (Cl. 98-39) This invention relates to a bombshelter ventilation means, and more particularly to a bombshelter having a vent pipe extending to a point above ground level.

It has been conventional heretofore to provide a bombshelter with a vent pipe extending to a point slightly above ground level. The end of the vent pipe which is slightly above ground level is generally provided with a hood thereon. The hood is generally provided with a screen or filter device therein. The disposition of the upper end of the vent pipe is generally close to ground level so that mischievous persons may introduce foreign matter into the vent pipe and clog the same. Such mischievous persons have also stolen the hood and filter device from the upper end of vent pipes.

The present invention is directed to a bombshelter having a vent pipe which is of sufiicient length so that the upper end of the pipe is spaced from ground level by a distance of approximately twenty-five feet. Means are provided on the vent pipe below the hood to prevent persons from climbing up the vent pipe. Such means comprise a circular shield or shields extending radially outwardly from the vent pipe at a point below the uppermost end of the pipe. The shield may be made from sheet metal, fiber glass, plastic, etc. and is provided with a serrated edge.

It is an object of the present invention to provide a bombshelter with a novel ventilation means.

It is another object of the present invention to provide a bombshelter with a vent pipe having its upper end substantially spaced from and above ground level, and with a tamperproof means being provided on said pipe to prevent entry of foreign matter into said pipe by mischievous personnel.

Other objects will appear hereinafter.

For the purpose of illustrating the invention there is shown in the drawings a form which is presently preferred; it being understood, however, that this invention is not limited to the precise arrangements and instrumentalities shown.

FIGURE 1 is a longitudinal sectional view of an underground bombshelter in accordance with the present invention.

FIGURE 2 is a sectional view taken along lines 2-2 in FIGURE 1.

FIGURE 3 is an enlarged elevation view of the edge of the shield taken along lines 3-3 in FIGURE 1.

Referring to the drawings in detail, wherein like numerals indicate like elements, there is shown in FIGURE 1 an underground bombshelter designated generally as 10.

The bombshelter may be of conventional construction and includes a floor 12, a Wall 14, and a top wall 16 made from concrete. The top wall 16 is spaced a substantial distance below ground level 18. The bombshelter 10 will be provided with an inlet or entrance in a manner which is conventional in the art. Thus, the particular details of the bombshelter 10, per se, form no par-t of the present invention except as will be explained hereinafter.

A ventilation means is provided for the bombshelter 10. Such ventilation means includes a vent pipe 20. One end of the vent pipe 20 is in communication with a hand-operated blower 22. The blower 22 is supported on a bracket 24 and includes a port 26 in communication with the interior of the bombshelter 10.

Patented June 11, 1963 "ice The other end of the pipe 20 extends to a point spaced from ground level 18 by a substantial distance. For example, such substantial distance may be approximately twenty-tive feet. A cup-shaped inverted hood 28 is secured to the upper end of the pipe 20. The hood 28 will be provided with a filter device as is conventional in the art. A tamperproof shield means is provided to prevent mischievous persons from interfering with the hood 28 or the passage of air through the pipe 20.

The tamperproof means includes a flat planar shield 30 which surrounds the pipe 20 and extends radially therefrom. Thus, the shield 30 lies in a plane which is substantially perpendicular to the longitudinal axis of the pipe 20. The inner peripheral surface of the shield 30 is rigidly secured to the outer peripheral surface of the pipe 20 in any convenient manner such as by welding, brazing, nuts and bolts, etc.

The shield 30 may be made from sheet metal, plastic, fiber glass, etc. and preferably has an outer diameter of approximately four feet. The pipe 20 has an outer diameter of approximately three inches. Thus, it will be seen that the shield 30 extends from all sides of the pipe 20 for a substantial distance. To further discourage persons from climbing up the pipe 20', the outer peripheral edge of the shield 30 is serrated. Alternate prongs 32 are bent upwardly out of the plane of the shield 30. The remaining prongs 34 are bent downwardly out of the plane of the shield 30.

A second shield 36, identical with shield 30, is positioned adjacent the upper end of pipe 20. The serrated edge of shield 36 and the large diameter thereof, prevents persons from reaching the hood 28' or throwing objects at said hood 28.

The shields 30 and '36 are a simple and effective device for preventing mischievous persons from introducing foreign matter into the pipe 20, throwing objects at hood 28 or removing the hood 28. The hood 28 will con.- tain a filter device and is imperforate so as to prevent rainwater from entering the pipe 20. The pipe 20 is preferably the inlet pipe for admitting air into the bombshelter '10. However, the pipe 20 may be the outlet pipe when used in conjunction with a similar pipe comprising the inlet pipe.

The pipe 20, in most cases, will be the only source of fresh air for the persons located within the bombshelter 10. Accordingly, there is a need to provide protective means such as the present invention for the pipe 20 since defects in the ventilation system will generally not be discovered until it is too late to rectify the same. In the event of a nuclear attack, thereby necessitating persons to use the bombshelter 10 and rely on the pipe 20 for ventilation, the shield 30 prevents persons external of the bombshelter 10 from purposefully interfering with the ventilation system. Thus, the shield 30 prevents persons exposed to radiation and refused admission into the bombshelter 10 from intentionally interfering with the ventilation system thereof.

The present invention may be embodied in other specitic forms without departing from the spirit or essential attributes thereof and, accordingly, reference should be made to the appended claims, rather than to the foregoing specification as indicating the scope of the invention.

I claim:

1. Apparatus comprising an underground enclosure, a pipe having one end in said enclosure, the other end of said pipe extending to a point above and substantially spaced from ground level, a hood on said other end of said pipe, and a tamperproof means secured to said pipe at a point intermediate said hood and ground level to prevent persons from climbing up said pipe to said hood, said tamper-proof means including a fiat shield lying in a plane substantially perpendicular to the longitudinal axis of said pipe, the inner peripheral diameter of said shield being fixedly secured to the outer peripheral diameter of said pipe, said flat shield having a minimum outer diameter of three feet, said fiat shield additionally having serrations about the periphery thereof, alternate serrations extending successively above and below the surface of the fiat shield.

2. The apparatus of claim 1 including a second flat shield, said first-mentioned shield being secured to said pipe intermediate said hood and ground level, said second shield being substantially similar to said first shield and being mounted adjacent said other end of said pipe, said second shield being located between said hood and said first shield.

3. The apparatus of claim 2 including an air filter mounted in said hood, and a blower, said blower being secured to said one end of said pipe in said enclosure, said hood having an inverted cup shape surrounding said filter and resting on said second fiat shield.

References Cited in the file of this patent UNITED STATES PATENTS 

1. APPARATUS COMPRISING AN UNDERGROUND ENCLOSURE, A PIPE HAVING ONE END IN SAID ENCLOSURE, THE OTHER END OF SAID PIPE EXTENDING TO A POINT ABOVE AND SUBSTANTIALLY SPACED FROM GROUND LEVEL, A HOOD ON SAID OTHER END OF SAID PIPE, AND A TAMPERPROOF MEANS SECURED TO SAID PIPE AT A POINT INTERMEDIATE SAID HOOD AND GROUND LEVEL TO PREVENT PERSONS FROM CLIMBING UP SAID PIPE TO SAID HOOD, SAID TAMPER-PROOF MEANS INCLUDING A FLAT SHIELD LYING IN A PLANE SUBTANTIALLY PERPENDICULAR TO THE LONGITUDINAL 